TR.27.2 Inclined Support Specification
These commands may be used to specify supports that are inclined with respect to the global axes.
General Format
SUPPORTjoint-list INCLINED { f1 f2 f3 | REF f4 f5 f6 | REFJT f7 } { PINNED | FIXED ( BUT release-spec (spring-spec) ) | ENFORCED ( BUT release-spec) } Where:
| Parameter | Definition |
|---|---|
| f1, f2, f3 | x, y, z relative distances from the joint in the global directions to the reference point |
| f4, f5, f6 | x, y, z global coordinates of an arbitrary reference point |
| f7 | a joint number whose x, y, z global coordinates are the reference point |
A vector from the joint location to the reference point
location serves to define a local coordinate system (same as member with
BETA = 0). The inclined support directions are in
this local
Inclined Support Axis System
(see more below).
Inclined Support Axis System(see below).
Inclined Support Axis System
The
INCLINED support specification is based on the
Inclined Support axis system.
The local x-axis of
this system is defined by assuming the inclined support joint as the origin and
joining it with a
reference point
with coordinates of f1, f2, and f3
(see the following figure) measured from the inclined support joint
in the global coordinate system.
The Y and Z axes of the
inclined support axis system have the same orientation as the local Y and Z
axes of an imaginary member whose
BETA angle is zero and whose incidences are defined
from the inclined support joint to the reference point.
G.4.3 Relationship Between Global and Local Coordinates
for more information on these concepts.
Example
SUPPORT
4 INCLINED 1.0 -1.0 0.0 FIXED BUT FY MX MY MZ